This variable is needed to track the change to BootDiscoveryPolicy variable. Boot options should be refreshed only if BootDiscoveryPolicy has been changed. Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com> Reviewed-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com> Acked-by: Hao A Wu <hao.a.wu@intel.com>